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Table 1 Characteristics of the patients

From: TNF inhibitors appear to inhibit disease progression and improve outcome in Takayasu arteritis; an observational, population-based time trend study

  Total cohort Population cohort Referral cohort Year of diagnosis
1999 or earlier 2000 onwards
Patients, n (%) 97 78 19 25(26) 72(74)
Female, n (%) 86 (89) 69 (93) 17 (89) 24 (96) 62 (86)
Caucasian, n (%) 77 (79) 59 (80) 15 (79) 21 (84) 56 (78)
Asian, n (%) 12 (12)    4 (16) 8 (11)
African, n (%) 7 (7)    0 (0) 7 (10)
Age at onset, mean (SD) 28.8 (13) 30.4 (14) 26.3 (11) 27.3 (12)a 29.2 (13)b
Age at diagnosis, mean (SD) 33.9 (15) 33.9 (15) 32.6 (14) 29.3 (13) 34.4 (15)
Age <16 years at onset, n (%) 12 (12)    4 (16) 8 (11)
Age <41 years at onset, n (%) 76 (78) 58 (74) 18 (95)* 21 (93) 55 (77)
Age >50 years at onset, n (%) 11 (11) 8 (11) 1 (5) 2 (8) 9 (13)
Follow up time (years), mean (SD) 11.7 (12)    27.5 (13) 6.2 (3)
Deceased (by end of 2013), n (%) 9 (9) 5 (6) 4 (21)* 9 (38) 0 (0)
Disease onset 1999 or earlier, n (%) 39 (42)     
Disease onset from 2000 onwards, n (%) 55 (58)     
  1. aAvailable in 16 patients. bAvailable in 68 patients. *p < 0.05 for the referral compared to the population cohort